Metal-organic Framework - Coordination Polymers and MOFs

Coordination Polymers and MOFs

There is no consensus in the scientific literature about the definitions of the terms coordination polymer and metal-organic framework. Some authors suggest definitions based on chemical bonding others propose that the terms coordination polymer and metal-organic framework are synonyms. An IUPAC project was initiated in 2009 to address the terminology issues in this area and will deliver its final report in 2012. A progress report has been published and provisional recommendations under review can be found here.

Classification of hybrid materials based on dimensionality
Dimensionality of Inorganic
Dimensionality of Organic 0 1 2 3
0 Molecular Complexes Hybrid Inorganic Chains Hybrid Inorganic Layers 3-D Inorganic Hybrids
1 Chain Coordination Polymers Mixed Inorganic-Organic Layers Mixed Inorganic-Organic 3-D Framework
2 Layered Coordination Polymer Mixed Inorganic-Organic 3-D Framework
3 3-D Coordination Polymers

Describing and organizing the complex structures of MOFs can be difficult and confusing. Recently, a system of nomenclature has been developed to fill this need. Inorganic sections of a MOF, called secondary building units (SBU), can be described by topologies common to several structures. Each topology, also called a net, is assigned a symbol, consisting of three lower-case letters in bold. MOF-5, for example, has a pcu net. The database of net structures can be found at the Reticular Chemistry Structure Resource.

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